function data = clust_denormalize(data)
% method description
% 'var' denormalization from a data whitch variation was normalized to one (linear operation).
% 'range' denormalization from a data whitch values were normalized between [0,1] (linear operation).
if isempty(data.min)==0
%if exist('data.min')==1
data.X = (repmat(data.max,size(data.X,1),1) - repmat(data.min,size(data.X,1),1)).*data.X + ...
repmat(data.min,size(data.X,1),1);
elseif isempty(data.mean)==0
%elseif exist('data.mean')==1
data.X = (repmat(data.std,size(data.X,1),1)).*data.X + repmat(data.mean,size(data.X,1),1);
else
error('Not normalized data or unknown normalization method.')
end
